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-rw-r--r--dom/media/test/crashtests/audiocontext-after-unload-1.html27
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diff --git a/dom/media/test/crashtests/audiocontext-after-unload-1.html b/dom/media/test/crashtests/audiocontext-after-unload-1.html
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+++ b/dom/media/test/crashtests/audiocontext-after-unload-1.html
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+<!DOCTYPE html>
+<html class="reftest-wait">
+<head>
+<title>Test for bug 1646601</title>
+<script>
+document.addEventListener('DOMContentLoaded', async () => {
+ const frame = document.createElement('iframe');
+ document.body.appendChild(frame);
+ frame.srcdoc = '<html></html>';
+ await new Promise(resolve => frame.onload = resolve);
+ const subwin = frame.contentWindow;
+ const subcontext = subwin.AudioContext;
+ // Construct an AudioContext while the subdocument is fully active to start
+ // a MediaTrackGraph.
+ new subcontext();
+ // Unload the subdocument and wait for completion.
+ // This shuts down the MediaTrackGraph.
+ subwin.location.reload();
+ await new Promise(resolve => frame.onload = resolve);
+ // Test that a new AudioContext on the inactive subdocument does not attempt
+ // to use the shut-down MediaTrackGraph.
+ try { new subcontext() } catch {}
+ document.documentElement.removeAttribute('class');
+});
+</script>
+</head>
+</html>